Gas-burner.



H.V. DEEMAR.

GAS BURNER.

APPLICATION FILED MARA, 1912.

I N VEN TOR.

A Y WITNESSES: H dr //w, M BY* @mE/ @m .Z @Q m l ATTORNEY.

HENRY V. DEEMAR, OF ST. LOUIS, MISSOURI.

GAS-BURNER.

Specification of Letters Patent.

Patented Dec. 17, 1912.

Application le. March 4, 1912. Serial No. 681,352.

To all whom it may concern.' A

Be it known that I, HENRY V. DEEMAR, citizen of the United States,v,residing at St. Louis, State of Missouri, have invented certain newand useful lImprovements in Gas- Burners, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, forming a part hereof.

My invention has relation to improvements in gas-burners; and itconsists in the novel details of construction more fully set forth inthe specification and pointed out in the claims.

In the drawings, Figure 1 is an elevation and a half section of theupper portion of the burner; Fig. 2 isa cross-section on the line 2 2 ofFig. 1; Fig. 3 is a half elevation and half section of a modified formof burner member; Fig. 4 is ahalf-section and half-elevation of a stillfurther modification; Fig. 5 is a top plan of Fig. 4, with parts brokenaway; and Fig. 6 is a top plan of a modified form on the order of Figs.4 and 5.

The object of my invention is to construct a gas or vapor burner whichmay be used for any industrial, commercial or domestic'purpose; onewhich shall deliver a long and pronounced flame without resort topressure above that of the atmosphere to supply the necessary head forthe projection of the flame beyond the end of the burner; one which willdevelop a flame of great heat intensity; one in which the back flash ispractically eliminated; one which can be made at little cost, comprisinga minimum number of parts; one readily appliedto a stove, furnace heateror apparatus of any description; and onepossessing further and otheradvantages better apparent from a detailed description of the inventionwhich is as follows.

Referring to the drawings, and for the present to Figs. 1 to 3inclusive, 1 represents the terminal of a vgas pipe leading from anysuitable source of supply (not shown), to which pipe is screwed theterminal threaded stem 2 of a (preferably) double truncated conicalmixing chamber 3, the larger truncated cone being provided with airopenings 0 controlled by corresponding openings o of the rotatable shellor damper 4, said air openings being disposed about the nipple 5 whichdischarges the gas into the chamber substantially along the axis of saidchamber. In the particulars referred to, the parts are in all essentialparticulars on the order of the well known Bunsen burner, except that inthe present instance a large and spacious mixing chamber is provided,the doubly converging walls whereof serve to insure a thorough mixturebetween the air and gas. The rotatable damper or valve 4 is held inposition by a collar 6 passed over the screw-stem 2 and held thereon bya binding screw 7. To a socket or neck 8 forming the discharge end ofthe mixing chamber is screwed one end of a pipe 9, the opposite endbeing screwed to a flanged disk 10 about the central opening of which onthe discharge side of the disk is disposed an annular or equivalentledge 11, between which and the outer edge or periphery of the disk areseries of air-intake ports 12 preferably circular as shown (though theymay be of any desired shape). Secured about the periphery of the diskand directed toward the mixing chamber is a ring 13 which forms anvannular apron about the ports 12, causing the air induced into the ports12 to `flow past the free edge of the apron and be directed inpathssubstantially parallel to the axis of the apron as the air flows throughthe space or chamber 14 formed between the pipe 9 and the apron. Thedisk 10 forms the perforated bottom of the burner-head 15, the latterbeing provided with peripheral air-intake openings 16 and being screwedto the outside of the disk 10. The parts 10` and 15 may however, be madein one piece if so desired. Resting on the annular ledge 11 is aretarding reticulated disk or grid 17 preferably of coarse mesh wire,the same forming a diaphragm against possible back-flash of the flameissuing from the burner, yet at the same time permitting a free anduninterrupted passage therethrough of the air entering the burnerthrough the ports or openings 12. The ledge 11 spaces the wire gauzemember 17 a slight distance from the inner vface of the disk 10. Thelength of the flame issuing from the mouth of the burner depends in ameasure on the degree of separation between the apron 13 and burner-head15, the depth of the peripheral screwthreaded flange 10 of the diskbeing such as to permit a greater or less degree of separation betweenthe adjacent ends of the said members 13 and 15, as obvious' from thedrawings, and as shown by the dotted showing in Fig. 1. The disk 10 neednot of course be cup-shaped, so long as it is sufficiently thick toallow for a reasonable adjustment of the distances between the parts 18and 15. The greater the separation between them the longer will be flameand vice-versa, the reason being that the deeper the apron (that is thefarther it projects toward the mixing chamber form the disk 10) the moreintense and direct is the air induction through the ports 12 and hencethe farther will the flame be projected. The projection o-f the flametherefore, beyond the mouth of the burner is accomplished by mereatmospheric influx of air into and through the ports 12 at normalatmospheric pressure and without the use of any artificial pressure.This constitutes one of the features of the present invention. i

It will be seen that the gas is supplied with a maximum quantity of air.First is the air complement which enters the mixing chamber through theopenings 0, 0 then the currents admitted through the ports 12 into theburner chamber 15; then the currents admitted through the openings 16.The result of it all is complete combustion and a hot flame.

In lieu of the diaphragm 17, I may substitute a perforated cap-piece 17closing the discharge end of the burner in which eventthe diaphragm 17is omitted. This modification is shown in Fig. 3.

For a very hot flame, I improvise a burner member 15 with intake ports16 conducting air into the hollow radial arms or tubes 18 of a spidercomposed of said arms and a single central ring 19, the air beingconducted to the center of the ring where all the oxygen is thusconcentrated. This produces a very intense flame. y Such a modificationis illustrated in Figs. 4 and 5. In other instances I may provide tworings 19, 19, with radial tubes 18, 18, as shown in the modification inFig. 6.

Having described my invention, what I claim is 1. In combination with amixing chamber having a gas intake and .an air intake, a burner-headpositioned to receive the gases from the chamber, the base of theburnerhead being provided with air-intake openings surrounding theintake thereto from the mixing chamber, and an apron surrounding saidair-intake openings and adjustable relatively to and from the burnerheadfor guiding the air-currents to said openings and regulating the lengthof flam projected from the burner-head.

2. In combination with a mixing chamber having a gas intake and airintake openings, a burner-head at .the discharge end of the mixingchamber, the bottom of the burner-head being provided with air intakeopenings disposed about the intake thereto from the mixing chamber, aperforated diaphragm positioned in the burner-head beyond the air intakeopenings aforesaid, and serving as a grid against back-flashing of theflame, and an apron surrounding the air intake openings of theburner-head.

3. In combination with amixing chamber having a gas intake and airintake openings, a pipe secured at the discharge end of the chamber, aburner-head secured to said pipe and having openings in its bottomdisposed about the pipe, a ledge disposed on the inner face of theburner-head bottom between said openings and the discharge from saidpipe, a reticulated diaphragm resting on said ledge and spaced from theburnerhead bottom, the peripheral walls of the burner-head beingprovided with air-intake openings, and an apron surrounding the bottomopenings ofY the burner-head and projecting toward the mixing chamberand adjustable relatively to and from the burner-head, substantially asset forth.

t. In combination with a mixing chamber having a gas intake and airintake openings, a burner-head at the discharge end of the mixingchamber, the bottom of the burner-head being provided with air-intakeopenings surrounding the intake to the burner-head from the mixingchamber, and an apron surrounding said air intake-openings for guidingthe air-currents to said openings and determining the length of theflame projected from the burner-head.

In testimony whereof I affix my signature, in presence of two witnesses.

HENRY V. DEEMAR. Witnesses:

EMIL STAREK, Jos. A. MICHEL.

Gopies ofth'is patent may be obtained for :five cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

